diff --git a/src/main/java/net/geedge/asw/module/app/service/impl/GitServiceImpl.java b/src/main/java/net/geedge/asw/module/app/service/impl/GitServiceImpl.java
index d0436cb..3a14315 100644
--- a/src/main/java/net/geedge/asw/module/app/service/impl/GitServiceImpl.java
+++ b/src/main/java/net/geedge/asw/module/app/service/impl/GitServiceImpl.java
@@ -323,8 +323,8 @@ public class GitServiceImpl implements IGitService {
             while (iterator.hasNext()) {
                 RevCommit currentCommit = iterator.next();
                 if (currentCommit.getId().getName().equals(commitId)) {
-                    if (iterator.hasNext()) {
-                        parentCommitId = iterator.next().getName();
+                    if (currentCommit.getParentCount() > 0) {
+                        parentCommitId = currentCommit.getParent(0).getName();
                     }
                     break;
                 }
@@ -370,23 +370,33 @@ public class GitServiceImpl implements IGitService {
      * 获取 commitIdA -> commitIdB 文件差异
      *
      * @param workspaceId
-     * @param commitIdA
-     * @param commitIdB
+     * @param newCommitId
+     * @param oldCommitId
      * @return
      */
     @Override
-    public List<Map<Object, Object>> getDiffFileListInCommits(String workspaceId, String commitIdA, String commitIdB) {
-        log.info("[getDiffFileListInCommits] [begin] [workspaceId: {}] [commitIdA: {}] [commitIdB: {}]", workspaceId, commitIdA, commitIdB);
+    public List<Map<Object, Object>> getDiffFileListInCommits(String workspaceId, String newCommitId, String oldCommitId) {
+        log.info("[getDiffFileListInCommits] [begin] [workspaceId: {}] [newCommitId: {}] [oldCommitId: {}]", workspaceId, newCommitId, oldCommitId);
         try (Git git = this.getGitInstance(workspaceId);
              Repository repository = git.getRepository();
              RevWalk revWalk = new RevWalk(repository);
              DiffFormatter diffFormatter = new DiffFormatter(null)) {
 
-            CanonicalTreeParser oldTree = new CanonicalTreeParser();
-            oldTree.reset(repository.newObjectReader(), revWalk.parseCommit(repository.resolve(commitIdB)).getTree());
+            RevCommit oldCommit = revWalk.parseCommit(repository.resolve(oldCommitId));
+            RevCommit newCommit = revWalk.parseCommit(repository.resolve(newCommitId));
 
+            if (newCommit.getParentCount() > 0) {
+                final RevWalk rw = new RevWalk(repository);
+                oldCommit = rw.parseCommit(newCommit.getParent(0).getId());
+                rw.dispose();
+            }
+
+            // oldTree
+            CanonicalTreeParser oldTree = new CanonicalTreeParser();
+            oldTree.reset(repository.newObjectReader(), oldCommit.getTree());
+            // newTree
             CanonicalTreeParser newTree = new CanonicalTreeParser();
-            newTree.reset(repository.newObjectReader(), revWalk.parseCommit(repository.resolve(commitIdA)).getTree());
+            newTree.reset(repository.newObjectReader(), newCommit.getTree());
 
             // diff
             List<Map<Object, Object>> files = T.ListUtil.list(true);
@@ -462,7 +472,7 @@ public class GitServiceImpl implements IGitService {
             }
             return files;
         } catch (IOException e) {
-            log.error(e, "[getDiffFileListInCommits] [error] [workspaceId: {}] [newCommitId: {}] [oldCommitId: {}]", workspaceId, commitIdA, commitIdB);
+            log.error(e, "[getDiffFileListInCommits] [error] [workspaceId: {}] [newCommitId: {}] [oldCommitId: {}]", workspaceId, newCommitId, oldCommitId);
             throw new RuntimeException(e);
         }
     }